Suh CH, et al. - In patients with head and neck squamous cell carcinoma, researchers assessed the diagnostic performance of DWI for differentiating metastatic cervical lymph nodes from benign cervical lymph nodes as well as identified optimal cutoff values for ADC. To identify relevant original articles in Ovid MEDLINE and EMBASE, they performed a computerized literature search. In patients with head and neck squamous cell carcinoma, DWI showed high diagnostic performance for differentiating metastatic lymph nodes from benign lymph nodes. The median ADC cutoff value was 0.965 × 10⁻³ mm²/s. The data presented in this work showed a 3-mm DWI slice thickness can provide a slight improvement in sensitivity.